Pump



Sept. 15. 1925.

v R. w. FLOYD PUMP v 2 Sma ts-Sheet 1 Filed Aug. 5, 192 4 ,vrromlm'rSept. 15, 1925.

R. w. FLOYD PUMP 2 Sheets-Sheet 2 UNITED STATESPATENT, OFFICE.

ROBERT WENTWORTH FLOYD,

Patented Sept. 15, 1925.

or MoNrcLAIn, NEW JERSEY.

PUIVIP.

Application filed August 5, 1924. Serial No. 730,138.

To all whom it may concern:

Be it known that I, ROBERT VVnNrwo-RTH FLOYD, a citizen of the UnitedStates, residing at Montclair, in the county of Essex and State of NewJersey, have invented certain new and useful Improvements in Pumps, ofwhich the following is a specification;

This invention relates to a manually op erable pump of the plunger type,which is particularly, although not exclusively, use ful in connectionwith hydrostatic jacks. The invention is equally applicable to a pumpthat takes in and discharges a liquid, and a pulsator that merely movesa column of liquid back and forth. Certain types of such hydrostaticjacks are provided witha pump which is pivotally connected to a pipe orconduit pivotally associated at its other end with the jack proper, anarrangement which has the advantages, among others, that it enables thepump to be operated at some distance from the jack and permits the pumpand the conduit to be folded into substantially parallel relationshipwith the axis of the jack, for convenience of storage.

The pump hereinafter described may be used in place of the pivotallyconnected pipe and pump used with jacks of the type above mentioned, andoffers the same advantages as that arrangement, besides possessingadditional advantages among which may be mentioned the avoidance of apivotal joint and the objections inherent therein.

Generally speaking, the invention is characterized by the fact that thepump casing, the pump cylinder, the piston and the actuating means forthe latter are telescopically arranged, thereby permitting the extensionof the pump casing so as to facilitate manual operation of the pump at adistance from the jack, for example, when the jack is located under amotor vehicle or at some other place which makes it inconvenient for theoperator to Work the pump from a position close to the jack. 7

The invention will be understood from the following description of apreferred embodiment thereof, taken in connectionwith the accompanyingdrawings in which Fig ure 1 is a side elevation of a hydrostatic jackhaving the invention applied thereto, the pump being in its collapsedposition; Figure 2 is a plan view of saidjack and pump, with the pumppiston drawn out;

preparatory to collapsing the latter; F ig- W ure 5 is a sectional view,on an enlarged scale, similar to Figures 3 and 4, but with the pumpfully collapsed; Figure 6 is a fragmentary longitudinal sectional viewof the shell which serves as a connection between the handle of the pumpand the pump piston; and Figure 7 is an end view of the shell shown inFigure 6.

Referring to the drawings, the pump, which is hereinafter described indetail, is shown applied to a hydraulic jack having a casing 10, and aliftingplatform 11 which is supported on the outer end of a plungerwhich moves vertically in the casing 10. The internal construction ofsaid jack forms no part of the present invention and need not bedescribed further than tosay'that within the casing 10 is a reservoirfor the oil or other motive fluid which, in the operation of the jack,is drawn and forcedthru Vi suitable valves located within the casing, bythe pump hereinafter described. The particular jack illustrated is of atype characterized by the fact that the pump, by which the jack isoperated, is pivotally connected to the jack casing as shown at 12, insuch a manner that lowering of the jack platform 11 may be effected bymoving the pump to a downwardly inclined position with refer ence to thejack. It will be understood,

however, that the pump hereinafter described is not limited to use witha jack of this or any other kind.

The pump which forms the subject of the present invention will now bedescribed. As

shown, the various parts of the pump are supported on a base member 15havinga In order to hold the inside casing 22 at either its collapsed orits extended vpositioi'i with reference "to the outer' casing 20, the inner casing 22 is shown as provided at its in; ner end witha thick washer24 secured to in casing 22 an'cbatoppo'site points" provided withcavities adapted to receive coiled springs 26 and the enlarged heads 27of locking buttons 28, as clearly shown in Figure 5. lVhen the casingmembers are completely ,collapsed,- as shown in Figure v5, the outerendsioif buttons 28- enter-holes 30 -jin the outer -casing-member20,;and thus-lock the casing members against relative movement. When theinner casing member 22 is; extended,-as shown inFi-gure 4,-the outerends of the buttons 28 enter-holes 31 in jthe casing 20,:thus lockingthe casing members in their extended position with reference to oneanothein j Within the telescopic casing and concentric therewith, is thepump cylinder 34, in the form of a tube, one 'end of which isthreaded-andscrews into a cavity aligning with the 1 passagefll8 in-the= base member 15. The-pump 'plungenoripiston inside the cylinder 34is shown ascomposed ofro'd 35, provided=with-a disc-shaped head 36. Therod 35 v-passesthrough -a stuffing box which, asshown,i-comprises-ashell 39,; at one end in threadedenga-gement with the endof the cylinder34,- asshownEat 40, and at the other end provided witha-lip 42'which-surrounds the ,plunger=35-. "As sho'wn in 'Figure 5,-the stuffingbox eontains packing *44 which ,is constantly "compressed by a ring-1 45surrounding the piston 35 and forced longitudinally thereof by ajcoiled-spring46 interposed between the end of the cylinder 34 andsaidring 45. I

Telescopically arranged in ,the casing member--22 is ashell 48 which is{part-of a manually operable means" for reciprocating the plunger or'piston" 35. 'Tliis :shell 48 is shown as provided with a lug-'50adapted to slide in-a groove 51 in: the 3 inside of the easing member22, thereby Zpreventingrot'ary movement of said shelland casingmemberwith reference'to oneanother; -At -its-outer end, the shell"48 isprovidedWith: a button or handle 54- whichisso secured-tosaid shell asto be rotatable thereon. --As shown, this rotatable connection comprisesa cap-sere-w'55 which loosely passes through a dis'c secured inthe-outer =end-of the shell 48,-;and screws into said handle'54. Handle54"is'provided with a threadedextension 58, "-ad-apted to; co-

operate with threads on :the inside of the inner cas1ng' nie111be1"22,thereby releasably securing the shell 48 within easing member 22 whenthe former is collapsed with -the-lat, ter. Asshown, the inner-casing'22 is a single piece of metal,-ithiekerthroughout its right-handportion than its left-*han d porbut it will be understood that inpractice said member 22 will be made of two tubes, one of which issecured within the other,jtlie inner tube beingiprovided with a slot 51throughout theinajor portion'of its lengthf The'shell 48, at its innerend, is provided with means adapted to engage and grasp "the head 36ofthe plunger 35. As shown,

this means comprises a plurality of pairs of lips 60 and 61 which may beformed in the shell 48 in the. manner best shownin liigures 5,76 and 7.8 Between each pair of lips 60 and 61, the shell 48 is slotted,a'sbestshown at 64 inFigures 6v and 7, 'therebyfin effect, dividing the innerend of 'the sh'ell48 into fingers. Whenfthe telescopic casing members2Qand 22 havebeenffully, extended to the position shown in'Figure 4, theaforesaid fingers on the end of thetube 48by which fthe lips 60 and 61are carriedfare flexed, as shown in Figure .4, owing to the engagementof all the lips 60 and 61 withthe outer surface of the shell 39.0t' the,stufling box, which acts as a cam. As the she llj48 'is pulled outwardlyfromthe' pos'itio'nsliown in Figure 4, the lips60 and 6l ridealong thesurface of the shell 39 until, upon leav ing it, they snap intoengagementjwiththe head36 on the end of thepump plu'nger'35. After thisl1as liappened, the shell 48 impositively secured to the end ortheplunger 3 5, as shown in Figure 3, and recipr'oc'ati'onot the shell48 withinthe telescopic casing is transmittedto the pump plunger35. Theoperator may, therefore, operatethe pump by applying one-hand to thebutton; 34-and forcingthe shell 48 i nwardly' and outwardly in thepumpcasing.

Aftera pumping operation has been completed, the handle 54 and shell 48maybe moved from the position shown in Figure 3 tothat shown in Figure4, afier'lwliichjt he buttons28 maybe pushed inwardlyenough to releasetheir ends from the" holes 31, whereupon the inner 1 casing member .22may be collapsed into the outer casing member 20, from the positionshown in Figure '4to that shown in Figure-5. If it is found that thebuttons 28 do not'readily register with the holes 30 and 31 when thetelescopiccas ing-is moved from its collapsed to-its'extended positionand vicelversa, the casing member 22 may be easily rotatedwith'reference to the casing member '20, by. graspii g the handle 34which screws into the casing member 22 and is thus nOnProtatable in ,oie direction with reference to'the latter; ln'extending thetelescopic"casing, the washer 24 engages-theinner end or the shell'39an'dthus Drevents the casings ections from beingeom pletely separated.

lVhilefI have shown and described what I consider to be a preferredembodiment of my invention, is of course to be understood that this maybe modified in many respects Without departing from the spirit of theinvention as defined in the claims hereto appended.

What I claim is:

1. In a pump, a telescopic casing, a cylinder mounted within saidcasing, a piston in said cylinder, and means telescopically ar rangedWithin said casing and capable of connection with said piston andadapted for manual manipulation to reciprocate the latter when thecasing is extended.

2. In a pump, a telescopic casing, a cylinder fixedly mounted withinsaid casing, a piston in said cylinder, manually operable meanstelescopically arranged within said casing, and means for detachablyconnecting said piston and said manually operable means, whereby thepiston may be reciprocate-d when the casing is extended.

3. In a pump, a telescopic casing, a cylinder mounted within saidcasing, a piston in said cylinder, a shell telescopically arrangedwithin said casing and capable of connection with and disconnection fromsaid piston and adapted for manual manipulation to reciprocate thelatter.

4. In a pump, a telescopic casing, a cylinder mounted within saidcasing, a piston in said cylinder, a shell telescopically arrangedwithin said casing, and means car-- ried by the inner end of said shellfor connecting and disconnecting the latter from said piston, wherebythe piston may be reciprocated by manual manipulation of said shell.

5. In a pump, a telescopic casing, 'a cylinder mounted within saidcasing, a piston in said cylinder, a shell telescopically arrangedwithin said casing and adapted to enter the space between said casingand said cylinder when the casing is in its collapsed position, andmeans for automatically effecting connection and disconnection betweensaid shell and piston when said casing and shell are extended andcollapsed respectively.

6. In a pump, a telescopic casing, a cylinder mounted within saidcasing, a plunger arranged for movement in said cylinder and having anend ejecting therefrom, a shell telescopically arranged within saidcasing, and means carried by said shell for automatically effectingconnection with and disconnection, from the end of said plunger whensaid casing and shell are extended and collapsed respectively.

7. In a pump, a telescopic casing, a cylinder mounted Within saidcasing, a piston in said cylinder, a shell telescopically arrangedwithin said casing and nonrotatable with reference thereto, means forelfecting connection and disconnection between said piston and saidshell when said casing and shell are in their extended and collapsedpositions respectively, and means for securing said casing and shell intheir collapsed positions.

8. In a pump, a telescopic casing, a cylinder mounted within saidcasing, a piston in said cylinder, a shell telescopically arrangedwithin said casing and nonrotatable with reference thereto, means foreffecting connection and disconnection between said piston and saidshell when said casing and shell are in their extended and collapsedpositions respectively, and a movable handle carried by said shell andadapted to cooperate with said casing for releasably connecting saidshell with said casing. I

9. In a pump, a telescopic casing,'a cylinder mounted within saidcasing, a plunger in said cylinder having an end projecting from thelatter,.a shell telescopically arranged within said casing', movablemeans carried by said shell adapted to engage the end of said plunger,and a cam member carried by said cylinder and cooperating with saidshell and serving to move the latter into and out of locking engagementwith said plunger.

10. In a pump, a base member, a telescopic casing ,securped thereto, acylinder secured at one end and to said base member within said casing,a piston in said cylinder, and means telescopically arranged within saidcasing andcapable of connection with and disconnection from said pistonand adapted for manual manipulation to reciprocate the latter when thecasing is extended.

In testimony whereof I have affixed signature to this specification.

ROBERT W'ENTl/VORTH FLOYD.

